Numerical reproduction of screening-current-induced fields in HTS tape windings using finite element method

29th International Symposium on Superconductivity

Okabe, Yuma^1 ; Honda, Tomokazu^1 ; Kajikawa, Kazuhiro^1

Department of Electrical and Electronic Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka

819-0395, Japan^1

关键词: Coated conductors;    Critical state;    Current vector potentials;    Field-dependent critical current;    High temperature superconducting (HTS) coils;    Screening current;    Superconductor layers;    Voltage-current characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012047/pdf
DOI  :  10.1088/1742-6596/871/1/012047

来源: IOP

【 摘 要 】

The screening-current-induced fields in one of the high temperature superconducting (HTS) coils fabricated previously with coated conductors are evaluated numerically by using a one-dimensional finite element method, in which only the perpendicular component of a current vector potential is considered due to a very thin superconductor layer in the coated conductor. It is assumed that the voltage-current characteristics in the superconductor layer can be expressed by the critical state or n-value model, in which the field-dependent critical current density is also taken into account. The numerically calculated results of the screening-current-induced fields are compared with the experimental results carried out previously.